小程序二维码

    public function actionMiniCode()
    {
        $code = Yii::$app->request->post();
        $url = WeixinUser::find()->where(['ecuid'=>$code['scene']])->asArray()->one();
        $headimgurl = substr_replace($url['headimgurl'],'s',4,0);
        $img = '/upload/mini/mini-'.$code['scene'].'.jpg';
        if (!empty(file_exists('.'.$img))) {
            return json_encode(['img'=>$img,'headimgurl'=>$headimgurl]);
        }

        $access_token = $this->AccessToken($code['appid'],$code['secret']);
        $url = 'https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token='.$access_token;

        $data = array();
        $data['scene'] = $code['scene'];
       //$data['scene']='uid'.$code['scene'];
        $data['page'] = $code['path'];
        $data = json_encode($data);

        $return = $this->request_post($url,$data);

        if(file_put_contents('.'.$img,$return)==true){
             echo  json_encode(['img'=>$img,'headimgurl'=>$headimgurl]);
        };
    }
    public function AccessToken($appid='',$secret='')
    {
        header('content-type:image/gif');

        $access = json_decode($this->get_access_token($appid,$secret),true);
        $access_token= $access['access_token'];
        return $access_token;
    }
    public function request_post($url, $data=''){

        $curl = curl_init(); // 启动一个CURL会话
        curl_setopt($curl, CURLOPT_URL, $url); // 要访问的地址
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // 对认证证书来源的检测
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); // 从证书中检查SSL加密算法是否存在
        curl_setopt($curl, CURLOPT_HTTPHEADER, array('Expect:')); //解决数据包大不能提交
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转
        curl_setopt($curl, CURLOPT_AUTOREFERER, 1); // 自动设置Referer
        curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Post提交的数据包
        curl_setopt($curl, CURLOPT_TIMEOUT, 30); // 设置超时限制防止死循
        curl_setopt($curl, CURLOPT_HEADER, 0); // 显示返回的Header区域内容
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回

        $tmpInfo = curl_exec($curl); // 执行操作
        if (curl_errno($curl)) {
            echo 'Errno'.curl_error($curl);
        }
        curl_close($curl); // 关键CURL会话
        return $tmpInfo; // 返回数据
    }
    //获取access_token
    public function get_access_token($appid,$secret){
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$secret}";
        return $data = $this->curl_get($url);
    }
    public function curl_get($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($curl);
        $err = curl_error($curl);
        curl_close($curl);
        return $data;
    }